Orb jig



June 30, 1925. 1,543,987

, E. M. DAUGHERTY ORE JIG Filed March 4, L924 6 Sheets-Sheet l IN VEN TOR mmewclrr;

ATTORNEYS WITNESSES June 36, 1925.

1,543,987 E. M. DAUGHERTY ORE JIG Filed March 4, L924 6 Sheets-Sheet 2 Q IN VENTOR WIS/N SE5 Z? MBA 0606K? Y M ATTORNEYS Julie 30.1925. 1,543,987

E. M. DAUGHERTY ORE JIG Filed March 4, 1924 6 Sheets-Sheet 5 A TTORNE YS June 30, 1925. 1,543,987

, E. M. DAUGHERTY ORE J'IG File d March 4, 1924 e Sheets-Sheet 4 WITNESSES v IN V ENTOR W a M-DJGI/EKTZ.

J/MA k2 A TTORNE YS June 30, 1925.

1,543,987 E. M. DAUGHERTY ORE JIG Filed March 4, 1924 6 Sheets-Sheet 5 WITNESSES w D4 OGHERI'Y,

BY K

A TTORNE YS June 30, 1925. 1,543,987

E. M. DAUGHERTY ORE JIG Filed March 4, 1924 e Sheets-Sheet e N KY) WITNES 1N VEN TOR W I END 9 uGflE/Pn;

A TTORNEYS Patented dune 3t 1325.

arr

ORE JIG.

Application filed March 4, i924. Serial No. 696,857.

To aZZ whom it may concern:

Be it known that I, ELMO M. Da'o'onnnrr, a citizen of the United States, residing at V ebb City, in the county of Jasper, State of lillissouri, have invented certain new and useful Improvements in Ore Jigs, of which the following is a specification.

This invention relates to improvements in ore jigs. i i

In the jigging process of mineral concentration it is often necessary to separatethe ores of two or more different metals into several grades or qualities of sieve and .hutch concentrates before the final separation of the different ores from each other and from their associated ganguematters; and it has been found that such work cannot for several reasons be performed to the best ties is desired, the use of single compartment igs requires the use 01' employment of an additional and unnecessary number ofdrive belts, pulleys, drive shafts, journal boxes, elevators, etc, which increase the cost of installation and maintenance.

jigs of the tandem type, it is highly essential in the treatment of many ores that such sieves be somewhat inclined toward the head end of the jig for the purpose of effecting a balance between the transporting effects of overflow waters and the attraction of gravity, thereby preventing the ore-beds from drifting toward the discharge end of the sieves and insuring a better distribution of such beds over the surfaces of the screens. Furthermore, in the construction of jigs of this type the ore-feed is received only at one end of the sieves and the overflow products In the usual construction and operation of the discharge ends of the jigs, causing the beds of material to form an unequal or irregular thickness, thereby causing unequal and restricted settling conditions.

As a result of the conditions above 111G11- tioned, the. pulsating or rising currents of Water from beneath the sieves will seek an outlet in the place of least resistance, this place being near the discharge ends of the sieve where the mineral beds are thinnest and irrespective of the adjustment of the water agitating means, it is impossible to prevent too much activity on the discharge ends of the mineral beds or insufficient activity on the head ends. As a result, low gravity minerals and middling products do not encounter sufficiently free settling conditions onfthe head ends of the sieves and on nearing the discharge ends where the rising current of water is stronger, a very considerable portion of such minerals are forced onto the next succeeding sieve below and so on throughout the entire length of the and finally lost in the tailing discharges.

In the operation of a jig of the tandem type, it is imperative that a greater quantity of water he admitted below the sieve of each compartment than is being emitted at the sieve discharge faucets below, and as the overflow of water passes onto the next succeeding sieve below it, the volume and velocity of such overflow waters increases throughout the entire length of the jig, causing:

First: The loss of considerable quantities of fine ores carried off in suspension with overflow waters,

Second: The loss of coarser material and middling products of low gravities which are carried off with overflow products as a result of a too high velocity of overflow waters and minerals and unnecessary agitation of the surfaces of mineral beds and its resultant hinderance of the stratification of minerals of low specific gravities.

As previously stated in the operation of multiple compartment of the tandem type, the volume and velocity of overflow waters increases on passing each succeeding sieve compartment and which effects, as a general result, a decreasing efficiency of the several sieve compartments throughout the length of such jigs.

By the law of gravity the first and mostefiicient sieve compartmentsof these tandem type jigs must be used in concentrating the minerals of the higher specific gravities, and which are the most easily concentrated, while the last and least eflic-ient sieves are employed in extracting the lower gravity minerals and middling products which are the most diflicult of extraction and very considerable quantities of valuable minerals are lost as a result of treating the most refractory minerals contained in the feed, on the least etlicient compartments of such jigs.

It is further noted that jigs now employed in a typical lead and zinc mill have usually from five to seven sieve compartments,

several of which are often employed in extracting the same kind or quality of mineral products, and such coarse minerals and middling products which do not settle down low enough in their progress along the first sieves, to be removed at the sieve oreor middling gates, must flow upward and pass over the discharge end of said sieves where it again becomes mixed with minerals of lower gravities, and as these minerals pass onto the next succeeding sieve below, a higher velocity of overflow water is encountered and as a natural consequence, such minerals are transported the length of the second sieve in less time than was required for such minerals to pass over the preceding sieve. Thus the chances of recovering these iewer gravity minerals by means of such jigs, become less on passing each successive compartment, a considerable portion of valuable minerals being lost as a result of these sieves being oi insufiicient lengths and too great innumber. V

' Also it is to be here noted that most jigs now in use are so constructed that it is necessary to draw the sieve concentrates at right angles with respect to the direction of the ore feed and flow, and it is obvious that low-gravity minerals and xmiddling products will not move as readily'on a line diagonal witlrthe direction of flow as if such gates opened in a direct line with the flow, and valuable ore and minerals are ary during the operation of the jigfexcept when ad usted by the operator. Now, as the beds of minerals move upward and down ward by force of the vertically reciprocatingestion of the jig plungers, it is obvious that stratas of minerals of widely varying sizes and gravites move up and down pastsuch stationary gate openings and permit fine low gravity minerals and gangue matters to escape carrying therewith much coarser and higher gravity'ores, and this is especially objectionable in removing low gravity minerals and low gravity products by means of such gates. Various types of gates have been devised to overcome this deficiency and usually all require the drawing of the sieve concentrates at right angles with the direction of flow or have only a single outlet and interfere somewhat with the work of cleaning the screens or obstruct the escape of overflow products over the discharge end of the sieve.

Furthermore, it should be here noted that owing to the unequal thickness of the mineral beds on jigs of the types heretofore referred to, settling conditions are considerably restricted near the feed ends of the sieves and which causes clogging or binding of the interstices of the screen. This. clogging of the screens has a strong tendency toward reducing both the capacity and efficiency of jigging operations and necessitates the cleaning of screens as frequently as once every hour during operation of the jig.

With that heretofore recited in view, it is an object of the present invention to provide an ore jig which is capable of operating in a highly eliicient manner through provision of means for enabling more uniform thickness in ore beds, by providing means to cause the velocity of overflow waters and minerals to decrease between the places of feed entry and overflow; by providing longer sieves; by providing more efficient ore and middling gates, and by providing means for increasing or diminishing the action of the ore beds during the operation of the jig.

Other objects,and.objects relating to details of construction, combination and arrangement of parts will hereinafter appear in the detailed description to follow.

The invention is illustrated by way of example in theaccompanying drawings, in which:

Figure l'is a view in side elevation of a form or" ig embodying the present invention, Figure 2 is a top plan view of the same, Figure 8 is a central longitudinal'section of the jig' shown in Figures 1 and 2 and with parts broken away and shown in section in order to clearly illustrate the operation of the jig,

Figure at is a vertical transverse sectional view through the middle compartment of the jig,

rangement of middling gate of the present invention,

Figure 6 is a detail view in side elevation showing the co-operative parts of the middling gate, v

Figure 7 is a detail View partly in side Figure 5 is a partial vertical sectional v1ew illustrating the construction and areases? elevation and partly in section further illustrating the manner in which the form of middling gate employed operates,

Figure 8 is a view similar to Figure 1 but showing a modified form of jig, and

Figure 9 is a top plan view of the same.

Like reference numerals designate cor responding parts throughout the several views. 1

Referring to the drawings in detail, and particularly Figures 1 to 7, inclusive, the jig shown comprises a suitable structure whereby to provide three different tanks A, E and C, respectively, and each tank comprises a rear wall 10, a front wall'll, twoend walls 12 and bottom 12. Each tank A, B and C is provided with a vertical and transverse division wall 13, the forward and upper end portion of which is offset, as at let, and thereby toprovide a support for the longitudinally extending division wall 15, said division wall together vwith the transverse division walls lg-f'orming in each tank A, B and C a pair of plunger compartments 16 which occur at the rear of the division wall and a-pairof hutch compartments 1'? which occur forward to the division wall 15 and which communicate with the plunger compartments, as illustrated to advantage in Figures. Each compartment 17 and associated compartment 16 is providcd with a false bottonrlS which is inclined, as shown and which extends between the rear wall 10 and front wallll of each tank. The falsebottom 18 may be supportedby brace 19, andeach compartment 17 may be provided with an outlet '20 which may be controlled through the means of a faucet or the like, not shown.

The rear side wall 10 may extend above the front walls 11 as shown to advantage in Figure i and also the end walls 12 and par tition walls '13 may be extended upwardly so that the same are of a height equal to the rear wall 10. These walls are utilized for supporting the shaft 22, said shaft carrying a suitable pulley 23, whereby the same may be rotated. The shaft is suitably journaled and has operatively connected thereto a plurality of connecting rods 24, one for each ofthe plunger con'ipartments 16. Each connecting rod 24: carries at its lower end an inverted U-shaped frame member 25, the terminals of which support a plate 26. A second plate 27 is provided and between the plates 26 and 27 there is clamped a plunger 28, said plunger being squared and conforming to the shape'of a plunger compartment 16.-

Each connecting rod is connected to the shaft 22 by the means of a second casting 34 and within this casting there is disposed an eccentric 35 which is secured to the shaft 22 and thereby with the turning of the shaft the plungers are reciprocated within the plunger compartments 16. The eccentric members 35 are so arranged that the plungers will operate for agitating the water within the plunger compartments at different intervals in order to obtain a uniform peration of the device. It is also necessary to secure the eccentrics of each of the companion compartments 16 so that they operate together or simultaneously and to arragne the eccentrics of dilierent compartments 120 apart with respect to the circumference of the shaft and thus affecting a balance between the plungers of the different compartments.

In each of the tanks A, B and C there is mounted a sieve The sieve of the middle tank B is arranged at a higher elevation than the sieves of the end tanks as illustrated to advantage in Figure 3. These sieves may be supported in any suitable manner and as shown in Figure 3 the transverse division wall 13 of each tank is slightly spaced at its upper end with respect to the associated screen SS'andthereby to provide communication between the Hutch compartments of each tank.

For the middle or center sieve 88 there is provided a launder 39, and said launder having associated therewith a suitable baffle plate, whereby to divide the. material passing therethrough and upon the screen 38, as illustrated in Figure 3. The screen 38 has also associated therewith a pair of aprons 40, one at each end thereof, and each apron communicating in turn with a launder ll disposed centrally of the associated end screen 38. Each launder -l1 is also provided with a suitable baffle plate, whereby the material passing therethrough will be divided previous to being deposited upon the associated screen 38;

It will be observed that each apron 40 has its inner end slightly elevated with respect to the middle or central screen 38, and the portion 42 of each end wall 12' of this tank is provided with a lining 42 upon its inner side and this lining is formed with a plurality of openings 48, preferably of the shape shown in Figure 6. Each opening 43 communicates with a similar opening 43 in the wall portion Each wall portion 4-3 has associated therewith a gate 4A which is slidable upon the inner side of the lining 42 of said wall portion and which is provided with a plurality of notches 4-5, along its lower edge. Each member a l is also provided with an inwardly extending flange as, whereby the gate 44 is suspended through means of bolts 47, brackets 47' and springs 48. Also suitable nuts 49 are carried by the bolts 47, whereby the position of the associate gate may be adjusted. The openings 43 each are adapted to deposit material flowing therethrough into a trough 50, and said troughs may communicate with any suitable receptacle. As shown in Figure 3 similar troughs 52 are provided for the end screens 38 and also similar gates 4r for controlling the flow of n'iaterial into these troughs. Furthermore, each end screen 38 18 provided with a pair of discharge aprons, one at each end thereof, as at 58, which are adapted to deposit material in suitable troughs 54 which comnnmicate with a'dewatering tank in each instance.

The operation of the present ig is similar in many ways to the operation of jigs now in use. The n'iaterial for treatment passes "from the feed laundry 39 upon the screen 38 midway between the ends of said screen and said material flows in opposite directions. The heavy or valuable minerals pass over the sieve 38 and settle down along the sieve and if sufliciently small pass through the interstices of the ore bed and screen into the hopper or hutch below, from which they are removed through faucets connected with the openings 20. The larger and heavier particles of the minerals settle down near the sieve and are removed by means of the ore gates 44; the valuables being received by the troughs 50 and disposed of as'desired. The lighter and remaining portions of the gangue matters and middling products pass overthe discharge ends of the central sieve and upon the end sieves where reconcentration is affected. The'beds of minerals upon the end screens 38 should be thinner than beds on central screen and the minerals of somewhat lower specific gravities' in order to effect the tree settling conditions which are highly essential for the ellicient concentration of low gravity materials. Of course, the process of concentration on these lastnamed sieves is the same as that of the central sieve excepting the middling products are removed from the end sieves instead of free ore products as with the central sieve and the overflow products or talhngs passing over the aprons 53 and conveyed by the troughs 5 iinto the dewatering flow products are disposed in four places,

thereby providingtor a less decline of flow hnes, a lower veloclty of overflow waters,

and a more equal thickness ofore-beds, without reducing the amount of workperformed, and enabling the igs to be operated with the sieves in a truly level position. By this arrangement of the sieve compartments it will 'be practicable to employ beds of minerals of almost equal thickness, and thereby providing for unequal and unrestricted settling conditions throughout the entire length of the sieves and higher ore recoveries.

l urthern'lore, in the'jig of my invention heretofore described, the sieve con'ipartments and flow lines are so arranged that thevelocity of overflow waters and mine 'als decreases between the points or feed entry and overflow. By such arrangement the velocity of the overflow waters and minerals will be greatly reduced when compared to jigs 01 the tandem type having equal sieve areas and treating an equal tonnage or equal amount of minerals. By this ii'nprovcn'icnt in jigs the following advantages are obtained: first, the collection of considerable quantities ottine materials resulting from a much lower velocity of overflow waters and better settling conditions; second: the collection of coarser materials and middling products oi comparatively low gravities due to the decreased agitation of the surface of mineral beds and also due to the low velocity of such minerals.

Also it should be noted that in the jig or my invention the sieves and flow lines are so arranged that the e'tliciency of the several sieve compartments increases toward the points of overflow, and the higher gravity materials are extracted on the central and less eflicient sieve, but where differences in gravities are usually ample for e'l'l'icient concentration. The lower gravity materials and middling products are extracted on the end or secondary sieves which are most etlicient in operation,thereby providing for higher jigging eficiency and enabling a higher degree or extraction of the more re tractory mineral products.

Also by using the longer si .ves as in the present invention and arranging the flow of the nniterial as shown and described, that is, depositing the material midway oi the sieve and then permitting the same to divide and flow in opposite directions much more time is allowed for the concentration of low gravity materials and middling prod ucts while passing over a sieve.

It will also be observed that with the improved form or ore and middling gates that the coarser and higher gravity ores may escape, said ores stratifying near the bottom 01 the beds. These gates operate due to the agitation caused by the plungers and will rise upon each surge of the water beneath the sieves caused by the action of the plung- -ers (and thereby permit the ores referred to to escape through the openings 4-3 into the troughs 40. These gates, of course, close at other times and prevent the escape of finer and lower gravity gangue matters which stratify near the top of the beds. These finer particles will, of course, eventually pass over the aprons M) of the middle sieve and over the aprons 43 of the end sieves. In substance, by providing the ore gates of my invention, the following advantages are obtained: First, the sieve concentrates are drawn in a straight-line with the direction otflow thereof ,second, the concentrates are drawnthe entire width. and at both ends of. each sieve; third, the uniform thickness ofore beds is maintained, and

fourth 'the removal of the sieve concentrates is in. easier and also provides for cleaner sieve concentrates to be obtained.

Referring to. Fignresfi and 9 in which I have shown a modification of the present in vention, the device may beidescribed as having two tanks and 61. The tank 60 is of a greater length; than the tank 61 and in one side of tiis tank there isformed a plu rality of plunger compartments 62 in the same manner as described for Figures lto '2', inclusive. .The tank" 60 is also provided with a longitudinally I extending division wall 63, whereby to prov de the hutch compartments or hoppers in, the forward end of the tank andwhich communieatewith the plunger compartments in the same manner as that described 'fo'rthe igs shown in Figures 1 to .7, inclusive. :In the compartments forward to thedivision wall, 63; there is ar ranged a plurality of screens G-Qswhieh are in tandem relation andcalso inclined, so that material fed into the hopper 65 will gravitate downward upon these screens, In each of the. plunger compartments there is arranged a plunger and which is suitably connected through the connecting rod, as shown in Figure 10, to a shaft 65, said shaft carrying eccentrics adapted to reciprocate these plungers. The shaft 65 may be driven from a belt pulley 66. The tank 61 18 proided with two plunger compartments 67 and in each compartment there is provided a plunger 68 which is driven from a shaft {39, said shaft being also provided with a drive pulley 70. The plungers 68 are connected to the shaft 69 so that the same will be reciprocated, Also the tank 61 is provided with a longitudinal divisional wall 71, whereby to provide different screen compartments or hutehes in the forward end portion of the tank and in which there is positioned an elongated screen 72.

An apron 75 is adapted to deliver the material from the lowermost screen Get to the middle of screen 72, and at this point the material will be divided and then move in opposite directions upon the screen 70. The screen is equipped with ore gates of the type heretofore described, and these ore gates discharge through suitable openings in the end walls of the tank into troughs '76. Also suitable troughs 77 are provided to collect the gangue and other material which pass over the top of the ends of the tank and these materials are brought into a dewatering tank 78. The last-described portion of this comprises a unit similar to either one of the units shown in'lligure 1, and oper ates in the same manner. ,By providin a of this character it is obvious that dif ferent ore may be operated upon, that is, the sieves arranged in tandem may beutilized to first stratify the material and then this ma terial after being subjected to this sieving operation may be lastly subjected to the sieve operation in which the material is guided and passed over a longer screen. It has been found that with a jig of this construction the same is adapted to work upon mos;- any material and also may be used to an advantage for primary and finishing services.

The j ig previously described and shown in Figures 1 to 7, inclusive, is particularly adapted for extracting the lower gravity materials and middling products as well as the very fine ores. I j l i hile I have shown and described two specific forms of my invention 1 wish it to be understood that I am aware of the fact that changes in the general arrangement and combination of parts may be made by those skilled in the art without departing from the spirit of my invention, as indicated by the appended claims.

I claim:

1. In an ore ig of the character described, a sieve compartment having a wall provided with a plurality of aligned openings, a gate comprising a plate member having notches in. its lower edge and adapted to be arranged in registration with the openings in said wall, means for suspending the gate to permit upward movement thereof, and a flange extending inwardly from said plate member adapted to serve as a bafiie plate and cause an upward surge of liquid within the associated sieve compartment to move the gate member upwardly and thereby increase the openings through the walls of said sieve compartment. l

2. An ore of the character described, comprising a central sieve compartment, means for delivering material to be separated upon the central portion of the sieve of said central compartment, a sieve compartment upon each side of the central compartment, and an inclined apron extending between the central portion of each side sieve compartment and the associated end of the central sieve compartment.

3. An ore of the character described, comprising a central sieve compartment, means for delivering material to be separated upon the central portion of the sieve of said central compartment, a sieve compart ment upon each side of the central compartment, an inclined apron extending between the central portion of each side sieve compartment and the associated end of the central sieve compartment, and means whereby the material being deposited upon each of openings in the end walls of each sieve compartment, whereby to permitrthe discharge of material having lugh specific griavlty.

5. In an ore jig'of the character described,

a plurality of inclined sieves arranged in tandem relation, means whereby material may be delivered to the uppermost sieve, a horizontal sieve arranged forward to the lower-.

most inclined sieve, and means whereby material moving from the lowermost of the inclined sieves may be delivered upon the horizontal sieve a central portion thereof.

6. In an ore jig of the character described,

a plurality of inclined sieves arranged in tandem relation, means whereby 'material may be delivered to the uppermost sieve, a horizontalsieve arranged forward to the lowermost inclined sieve, means whereby material moving from the lowermost of the inclined sieves may be delivered upon the horizontal sieve at a central portion thereof,

and meanswhereby the material delivered to said horizontal sieve may be divided be: fore being deposited upon said sieve.

7. In an ore jig of the character described, a plurality of inclined sieves arranged in tandem relation, means whereby material may be delivered to theuppermost sieve, a horizontal sleve arranged forward to the lowermost inclined sieve, means whereby material moving from the lowermost of the,

inclined sieves may be delivered upon the horizontal sieve at a central portion thereof, a wall for each end of the horizontal sieve, and gate-controlled openings in each wall whereby to permit the discharge of materials having high specific gravities.

8.111 an ore jig of thecharacter described, a plurality of inclined, sieves arranged in tandem relation, means whereby material may be delivered tothe uppermost sieve, a horizontal sieve arranged forward to the lowermost inclined sieve, means whereby material moving from the lowermost oi": the

inclined sieves may be delivered upon the horizontal sieve at a centralportion thereof, a wall for each end of the horizontal sieve, gate-controlled openings in each wall, where by to permit the discharge of materials having high specific gravities, and an apron disposed above each end wall of said horizontal sieves and adapted to discharge ma terials having a low specific gravity.

ELMO M. DAUGI-IERTY. 

